MIPS: Move CPU topology macros to topology.h

The correct position is topology.h, and this fix macros redefinition
problems for Netlogic.

[ralf@linux-mips.org: Fix build - the original patch broke most
configurations.]

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Jayachandran C. <jchandra@broadcom.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7575/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>